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onsemi MC33167D2TR4
- Part No.:
- MC33167D2TR4
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MC33167D2TR4.pdf
- Description:
- IC REG BUCK BST ADJ 5.5A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,331
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Product details
Overview
MC33167D2TR4 from onsemi is a fixed-frequency voltage-mode switching regulator IC designed for step-down, inverting, and step-up/down DC-DC converter topologies. It integrates a 5.0 A output switch, 72 kHz oscillator, precision 5.05 V ±2% reference, cycle-by-cycle current limiting, and thermal shutdown - enabling compact, high-efficiency power supplies in automotive and industrial applications.
For engineers reviewing the MC33167D2TR4 datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific design meaning, real-world application constraints, and validated alternative options for stable supply chain selection.
Technical Context
The MC33167D2TR4 implements voltage-mode PWM control with an internal 72 kHz oscillator (±10% over temperature), 0–95% duty cycle range, and a latching pulse-width modulator that prevents multiple pulses per cycle. Its error amplifier features 80 dB open-loop gain and 600 kHz unity-gain bandwidth, referenced to a trimmed 5.05 V bandgap source.
Protection architecture includes undervoltage lockout (startup threshold 5.9 V with 0.9 V hysteresis), cycle-by-cycle current limiting (typ. 6.5 A peak switch current), and thermal shutdown at ~170 °C. Standby mode reduces supply current to 36 µA when compensation pin voltage drops below 0.15 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 72 kHz nominal; enables predictable EMI filtering and consistent inductor sizing across input voltage range (7.5–40 V) |
| Output Switch Current | 5.0 A continuous; supports ≥3 A load in step-down configurations with proper heatsinking and layout |
| Voltage Reference Accuracy | ±2% at 25 °C; ensures regulated output stability without external trimming in cost-sensitive designs |
| Operating Ambient Range | −40 °C to +85 °C; qualified for under-hood automotive and industrial environments |
| Current Limit Threshold | 6.5 A typical; provides robust short-circuit protection while allowing transient surge margin |
| Standby Supply Current | 36 µA at 12 V; enables low-power sleep modes in battery-backed systems |
| UVLO Threshold | 5.9 V startup with 0.9 V hysteresis; prevents erratic operation during brown-out conditions |
Pinout & Package
MC33167D2TR4 uses the D2PAK (TO-263) surface-mount package (Case 936A), with the exposed tab electrically connected to Pin 3 (Ground). This thermally enhanced package supports higher power dissipation than TO-220 variants and requires PCB copper area for effective heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Compensation) | Error amplifier output / loop compensation node | Connects to RC network (RF, CF) for stability tuning; clamping below 0.15 V activates standby mode |
| Pin 2 (Switch Output) | Collector of internal NPN power transistor | Drives external inductor; must be routed with minimal trace inductance to reduce ringing and EMI |
| Pin 3 (Ground) | Power and signal reference plane | Internally tied to exposed tab; requires low-impedance PCB ground plane connection for thermal and noise control |
| Pin 4 (VCC) | Primary power supply input | Accepts 7.5–40 V; powers internal circuitry and bias networks; bypass capacitor mandatory |
| Pin 5 (Feedback) | Inverting input of error amplifier | Monitors output via resistor divider; threshold fixed at 5.05 V; no external reference required for 5 V output |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5.0 A switch | Eliminates need for external power transistor in ≤3 A step-down converters, reducing BOM count and board space |
| Fixed 72 kHz oscillator | Enables predictable EMI spectrum placement and simplifies filter design versus variable-frequency alternatives |
| 5.05 V ±2% internal reference | Supports accurate 5 V output without external resistors; compensates for typical 1% cable drop |
| Cycle-by-cycle current limiting | Provides immediate fault response per switching cycle, preventing MOSFET or inductor saturation damage |
| Thermal shutdown at ~170 °C | Protects against catastrophic failure due to inadequate heatsinking or airflow loss |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Regulating 12 V battery input to stable 5 V for microcontroller, CAN transceiver, and sensor interface circuits in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary step-down DC-DC controller with integrated switch; operates at fixed 72 kHz to meet automotive EMI limits. Use Value: Single-chip solution reduces component count vs. controller+external FET, while −40 °C to +85 °C rating ensures reliability across vehicle operating conditions. | Use Scenario: Generating isolated 5 V and −12 V rails from 24 V DC bus in modular PLC backplanes requiring dual-polarity analog sensing. IC Role / Device Role / Timing Role: Configured in voltage-inverting topology to produce negative rail; uses same oscillator and feedback architecture as step-down mode. Use Value: Eliminates need for separate inverting charge-pump IC; leverages internal 5.05 V reference and current limit for predictable regulation under varying load steps. |
| Off-Line AC/DC Preconverter Stage | Brushed DC Motor Speed Control |
Use Scenario: Serving as post-regulator after a flyback preconverter (e.g., Figure 28), delivering tightly regulated 24 V from rectified AC line-derived 40 V intermediate bus. IC Role / Device Role / Timing Role: Step-down controller handling wide-input-range (7.5–40 V) conversion; UVLO prevents start-up below minimum bus voltage. Use Value: Enables distributed power architecture with independent regulation per subsystem, improving overall system efficiency and fault isolation. | Use Scenario: Controlling speed of 18 V brushed motor using EMF feedback in HVAC actuators or valve positioners. IC Role / Device Role / Timing Role: PWM generator with analog feedback loop; error amplifier compares sensed back-EMF to setpoint, adjusting duty cycle dynamically. Use Value: Delivers precise RPM control without encoder; internal current limit protects motor windings during stall or overload events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34167D2TR4G | Same die, but rated for 0 °C to +70 °C ambient; identical electrical specs and pinout | Not qualified for extended temperature automotive or industrial use; suitable for commercial-grade equipment | Select only if operating environment stays within 0–70 °C and cost is prioritized over temperature margin |
| LM2596S-5.0 | Fixed 5 V output (non-adjustable); lower 3 A switch current; 150 kHz switching frequency | Limited to step-down only; lacks inverting/step-up-down capability and thermal shutdown hysteresis | Choose for simpler 5 V point-of-load regulation where multi-topology flexibility and extended temp are unnecessary |
Compared with MC33167D2TR4, MC34167D2TR4G offers identical performance but reduced temperature qualification, while LM2596S-5.0 trades topology versatility and ruggedness for lower cost and simplified design in fixed-output, commercial-temperature applications.
Availability
MC33167D2TR4 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, off-line preconverter stages, and brushed motor control systems requiring stable component supply across extended temperature ranges.
Supply support for MC33167D2TR4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, and automotive ICs.
The MC33167 series belongs to onsemi's legacy high-current switching regulator product line, engineered for robust, low-component-count DC-DC conversion in harsh environments including automotive and industrial settings.
FAQ
What is the maximum input voltage for the MC33167D2TR4?
The MC33167D2TR4 supports a maximum power supply input voltage (VCC) of 40 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent device damage. The recommended operating range is 7.5 V to 40 V, with undervoltage lockout engaging below 5.9 V to prevent unstable startup.
Does the MC33167D2TR4 require an external resistor divider to set the output voltage?
No - the MC33167D2TR4 includes an internal 5.05 V reference, so a fixed 5 V output can be achieved without external resistors by connecting the feedback pin directly to the regulated output. For voltages above 5.05 V, a resistor divider (R1/R2) must be added to scale the feedback voltage appropriately.
Can the MC33167D2TR4 be used in a voltage-inverting configuration?
Yes - the MC33167D2TR4 is explicitly designed for voltage-inverting applications (see Figure 23 in the datasheet). It achieves this by re-referencing the ground pin to the negative output, enabling stable −12 V/1.7 A generation from a 12 V input with appropriate external components.
What is the thermal resistance (θJA) of the MC33167D2TR4 in its D2PAK package?
The MC33167D2TR4 in the D2PAK (Case 936A) package has a junction-to-ambient thermal resistance (θJA) of 70 °C/W at TA = +25 °C with standard PCB mounting. Actual θJA improves significantly with increased copper area - e.g., 2 oz. copper and 30 mm pad length reduces it to ~40 °C/W per Figure 29.
How does the standby mode function in the MC33167D2TR4?
Standby mode in the MC33167D2TR4 is activated when the voltage at Pin 1 (Compensation) falls below 0.15 V, reducing supply current to 36 µA. This feature enables ultra-low-power sleep states in battery-powered systems, and recovery occurs automatically when compensation voltage rises above the threshold.
MC33167D2TR4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5.05V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 5.5A (Switch)
- Frequency - Switching:
- 72kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
MC33167D2TR4 FAQ
1.How can I place an order for MC33167D2TR4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33167D2TR4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC33167D2TR4 reliable?
The price and inventory of MC33167D2TR4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33167D2TR4 is usually 5 days.
3.What payment methods are accepted for MC33167D2TR4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33167D2TR4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33167D2TR4?
MC33167D2TR4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33167D2TR4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC33167D2TR4?
For technical support, including MC33167D2TR4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33167D2TR4 requirements.
6.How does Aetrix verify that MC33167D2TR4 is sourced from the original manufacturer or authorized distributors?
All MC33167D2TR4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC33167D2TR4 meets industry standards.
7.What is the process for return or replacement of MC33167D2TR4?
All MC33167D2TR4 units undergo pre-shipment inspection (PSI). If there is an issue with MC33167D2TR4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC33167D2TR4 part is unused and in its original packaging.
Return procedure for MC33167D2TR4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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